9 results about "Alunite" patented technology

The present application relates to the technical field of building materials, and particularly relates to a solid waste-based Yellow River sediment gelatinized material and a preparation method of artificial flood-prevention prepared stone. The solid waste-based Yellow River sediment gelatinized material comprises the following raw materials in parts by weight: 300-500 parts of Yellow River sediment, 80-130 parts of cinder ash, 40-80 parts of steel slag, 20-50 parts of alunite tailings, 25-55 parts of mirabilite gypsum, 0.5-1.5 parts of crack self-repairing material, and 1-3 parts of workability regulator. The artificial flood-prevention prepared stone prepared by the method has excellent mechanical properties and erosion resistance, can reduce carbon emissions and improve ecological properties, and makes the Yellow River sediment realize resource utilization.

The invention discloses a method for realizing high-valued utilization of aluminum and potassium metals in alunite based on fluosilicic acid, which comprises the following steps: stirring and leaching fluosilicic acid and alunite, and carrying out solid-liquid separation after leaching to obtain a leaching solution containing aluminum and sulfur and leaching residues containing potassium fluosilicate and silicon dioxide; crystallizing and roasting the leachate to obtain an aluminum fluoride product; a desulfurizer is added into crystallization mother liquor, sulfate radicals and fluosilicic acid are separated, the sulfate radicals are output in a sulfate form, and the fluosilicic acid is recycled for leaching operation; and the leaching residues are subjected to alkali washing, filtering and drying, silicon and potassium separation is achieved, and a potassium fluoride product and high-purity silicon dioxide are obtained respectively. According to the method, selective separation and high-value utilization of aluminum and potassium elements in the alunite are realized by utilizing the reaction of fluosilicic acid and the alunite and combining unique process configuration and operation conditions based on the property difference of the leachate and the leaching residues, and the method is simple in process flow configuration, high in resource utilization rate and good in industrial application prospect.

The invention provides a wide-temperature-range well cementation cement expansion reinforcing material as well as a preparation method and application thereof. The wide-temperature-range well cementation cement expansion reinforcing material is prepared from the following components in percentage by mass: 20 to 40 percent of sulphoaluminate cement, 20 to 40 percent of calcium sulfate, 30 to 60 percent of potassium feldspar, 1 to 10 percent of nano Al2O3, 1 to 10 percent of nano MgO, 1 to 10 percent of alunite and 1 to 10 percent of aluminoferrite cement. The wide-temperature-range well cementation cement expansion reinforcing material is suitable for well cementation operation under medium-low-temperature and ultra-high-temperature deep well conditions, and well shaft sealing integrity and well cementation quality can be improved.

The invention relates to a method for separating and recovering multiple metals from clay type lithium ore pickle liquor, and belongs to the technical field of comprehensive utilization of clay type lithium ores. According to the method, potassium hydroxide is added into the clay type lithium ore pickle liquor to precisely regulate the pH value of a system to 1.0-3.0, and then precipitation is induced, so that a lithium-rich solution and alunite residues are obtained. And the obtained lithium-rich solution is subjected to concentration and lithium precipitation, and a high-purity lithium carbonate product is obtained. The obtained alunite slag is subjected to controllable pyrolysis, a pyrolysis product is obtained, sulfur-containing flue gas is recycled for acid making, and sulfuric acid can be returned to treat clay type lithium ore. The pyrolysis product is subjected to water leaching, and after water leaching is completed, a potassium-rich solution and an aluminum oxide product are obtained through liquid-solid separation. And concentrating and crystallizing the potassium-rich solution to obtain a potassium sulfate product. Through comparison, it is found that comprehensive treatment of the clay type lithium ore pickle liquor is not involved in the prior art, the method for separating and recovering multiple metals from the clay type lithium ore pickle liquor is provided, efficient separation and comprehensive recovery of lithium, aluminum and potassium can be achieved, the resource value and economic benefits are remarkably improved, and the method is suitable for industrial production. And a new path with a great prospect is opened up for high-value utilization of the clay type lithium ore.

The invention discloses a method for realizing resource utilization of aluminum, potassium and silicon in copper tailings through beneficiation and smelting synergism, which comprises the following steps: grading copper beneficiation tailings containing alunite, dickite and quartz to respectively obtain fine particles and coarse particles, directly floating the fine particles, regrinding and reselecting the coarse particles, mixing concentrates floated twice, and taking the flotation tailings as quartz concentrates; adding fluosilicic acid into the bulk concentrate for leaching; crystallizing leachate to obtain an aluminum fluoride product, heating and concentrating crystallization mother liquor, returning fluorine-containing gas to leaching operation, adding concentrated liquor into quartz concentrate, purifying and removing iron to obtain a high-purity quartz product, and purifying and removing impurities from filtrate to obtain copperas and calcium sulfate; and grading, alkali washing, filtering and crystallizing the leaching residues in sequence to respectively obtain a high-purity silicon dioxide product and a potassium fluoride product. Based on the composition and property differences of the dickite, the alunite and the quartz in the copper-containing mine tailings, various technologies of flotation, grading and metallurgy are combined, and reduction of the copper mine tailings and high-value utilization of aluminum, potassium and silicon resources are achieved.

Provided in the present invention are a cement expansion and reinforcing material for wide temperature range cementing and a preparation method therefor. Said cement expansion and reinforcing material comprises the following components in percentage by mass: 20-40% of sulfoaluminate cement, 20-40% of calcium sulfate, 30-60% of potassium feldspar, 1-10% of nano Al2O3, 1-10% of nano MgO, 1-10% of alumite and 1-10% of ferroaluminate cement. Said cement expansion and reinforcing material is suitable for cementing operations under medium-low temperature and ultra-high temperature deep well conditions, and can improve wellbore sealing integrity and cementing quality.

The invention discloses artificial marble and a preparation method thereof, and the artificial marble comprises the following components in percentage by mass: 20.00%-29.00% of mineral powder, 0.00%-3.60% of I-grade fly ash, 2.80%-5.40% of desulfurized gypsum, 0.28%-1.80% of Portland cement, 0.14%-0.72% of a reinforcing agent, 0.22%-0.54% of a composite additive, 55.92%-65.68% of sand and 5.04%-7.20% of water, the composite admixture is a compound of a polycarboxylic acid water reducer and a polyether defoaming agent, the artificial marble with extremely low porosity and high strength is prepared through negative pressure stirring, vibration forming and curing, the compressive strength of 28 days is larger than 80 MPa, and the breaking strength is larger than 10 MPa. The invention relates to a high-performance inorganic artificial stone material which is obtained by fully utilizing a slag gelling system of a sulfate activator and modifying with calcined alunite.

The application provides a preparation method of a phosphogypsum-based hydraulic material based on microwave chemical compounding, comprising the following steps: S1, removing impurities and drying phosphogypsum; S2, adding coke powder, sodium sulfate and calcined alunite, uniformly mixing, and microwave irradiating the mixture; S4, adding silicate cement clinker, steel slag powder, mineral powder and fly ash, uniformly mixing, and then crushing to 380-480 meshes; S5, adding calcium aluminate, quicklime and quick-dissolving solid water glass, mixing and grinding, and the phosphogypsum-based hydraulic material is obtained. The phosphogypsum-based hydraulic material has high strength.

The present invention relates to a method for the preparation of alumina from an alunite material, the method comprising the steps of: subjecting the alunite material to an alkaline hydroxide leach step; subjecting the product of the alkaline hydroxide leach step to a solid liquid separation to produce a liquid product comprising potassium sulfate and a solid residue comprising alumina; subjecting the solid residue containing alumina to an acid leach step to produce an aluminous leach solution and separating undissolved solids; subjecting the aluminous leach solution to a crystallisation step to crystallise an aluminium salt; and subjecting the aluminium salt to a calcination step to produce alumina.